I too had this problem and tried your suggestion but it didn’t work. I looked elsewhere in the js folder and edited the following file:

js/prettyPhoto/js/jquery.prettyPhoto.js

I just changed this bit….

‘overlay_gallery:true’ to overlay_gallery:false

and it worked! No more thumbnails. I am just checking with you though to make sure this will not affect anything else in a negative way cos i am not a programmer or anything. Also i wouldn’t want to mislead anyone into doing something that might harm their site. Thanks.

your methode works too (you just set the default setting to false (normally it’s set to true)). The only negative side effect is that you must modify prettyphoto.js everytime you update the prettyphoto files which might be required more often than updating the theme files. However there’s no “real” drawback.